Nishii Mari, Yasutomi Masaharu
Kyoto Prefecture Agriculture Experiment Station, Ayabe-Shi 623-0221, Japan.
J Poult Sci. 2024 May 31;61:2024016. doi: 10.2141/jpsa.2024016. eCollection 2024.
spp. inhibit the growth of spp. . However, in chicken crops, in which spp. predominate, such inhibition of has not been confirmed. In our previous study, feeding paddy rice to broiler chicks increased the residence time of the food, which might enhance the bactericidal activity of the crop. Here, the bactericidal activity against the remaining spp. in broiler crops was evaluated. A suspension prepared by mixing and titanium dioxide (TiO) was inoculated into the pharynx of 26-day-old broiler chicks fed a paddy rice-based diet. The crop contents were sampled at 20-min intervals. The TiO residual ratio in the crop gradually decreased with time after inoculation, with 57% of the inoculated TiO remaining in the crop 60 min after inoculation. The survival fraction of in the crops was 11% at 40 min, only 1% at 60 min, and was undetectable at 80 min. Most of the inoculated died in the crop before entering the next segment. These data indicated that bacterial death occurred between 30 min and 40 min after inoculation. The average survival time of in the crop was calculated to be 37.1 min. Thus, remaining in a chicken crop for more than 40 min died.
某物种抑制另一物种的生长。然而，在以某物种为主的鸡嗉囊中，这种对另一物种的抑制作用尚未得到证实。在我们之前的研究中，给肉鸡雏鸡喂食水稻增加了食物的停留时间，这可能会增强嗉囊的杀菌活性。在此，评估了肉鸡嗉囊中对剩余某物种的杀菌活性。将某物质与二氧化钛（TiO₂）混合制备的悬浮液接种到喂食以水稻为主食的26日龄肉鸡雏鸡的咽部。每隔20分钟采集一次嗉囊内容物样本。接种后，嗉囊中TiO₂的残留率随时间逐渐降低，接种后60分钟，接种的TiO₂中有57%残留在嗉囊中。嗉囊中某物种在40分钟时的存活分数为11%，60分钟时仅为1%，80分钟时无法检测到。大多数接种的某物种在进入下一段之前在嗉囊中死亡。这些数据表明细菌死亡发生在接种后30分钟至40分钟之间。计算得出某物种在嗉囊中的平均存活时间为37.1分钟。因此，留在鸡嗉囊中超过40分钟的某物种死亡。
